Fumigating cap



June 30, 1936., w. c. PURDY FUMIGATING CAP Filed July 19, 1935 w 0 PINVENTCR urd BY M W M ATTQRNEY wnm esszs Patented June so, 1936 2,046,132

UNITED STATES PATENT OFFICE FUMIGATING CAP William C. Purdy, Tallulah, La.

Application July 19, 1935, Serial No. 32,300

2 Claims. (01. 220-87) This invention relates to fumigating devices portion 4 in proper position for receiving the cap and particularly fumigating devices for substanbody I. tially airtight containers, an object being to pro- The cap body I is open at the bottom as shown vide an improved structure which may be so in Fig. 1 and is filled with any kind of fumigating mounted as not to be in the way at any time but chemical which is held in place by a filling l3 of 5 to provide the desired fumigation at all times. cotton. The cotton is saturated with the fumi- Another object of the invention is to provide a gating chemical and then placed in position, or, if fumigating cap for containers for food or other desired, the cotton could be placed in position ingredients wherein the vapor or gases from the first and the fumigating chemical poured therechemicals may enter the container and be held over until the cotton is saturated. After this has 10 against discharge therefrom. been done a foraminous plate I4 is positioned as An additional object, more specifically, is to shown in Fig. 1. This plate is a thin disk of metal 5 provide in a container, a fumigating cap strucwith a number of ope therein and With a ture which may be readily mounted and which is number of holding pr j i protuberances provided with means whereby the contents may Hi. In the drawing three protuberances have 15 be readily charged from time to time. been shown so positioned that they will register In the accompanying drawingwith the notches l0 and flange 9. The plate I4 is Figure 1 is an elevation of the up er part f placed against the flange 9 and rotated until the 1 container showing an embodiment of th invem protuberances snap into and pass through the tion; notches H3 after which the plate I4 is rotated at 20 Fig. 2 is a bottom plan View of the cap and esshort distance as indicated by the dotted lines l6 sociated parts shown in Fi 1; in Fig. 2. After the cap body has been assem- Fig. 3 is an elevation of a, forarnjnous plate bled in this manner it is screwed tightly into the forming part of the cap structure; position shown in Fig. 1. The cap body may be Fig. 4 is a view on an enlarged Scale Similar removed from time to time and be filled as de- 25 a to the central part of Fig. l and illustrating a siredmodified form of fastening structur In shipping difierent kinds of food more or less Referring to the accompanying drawing b in the dry state, it is desired under many cirmerals, l indicates th body of t container, and cumstances to provide an insecticide or disinfect- 2 the upper end structure, Th container may ant which is in the nature of a vapor, and the 30 be of any desired kind, as, for instance, the kind present v t n t mplat s takin care of disclosed in my co-pending application serial a situation of this kind. After the container I No. 29,996,;fi1ed July 5, 1935, The end Structure has been filled the cap body I is screwed into 2 is adapted to include a thickened end plate a place d then t e containe is eady for ipwhich may be made up of a number of paper or ment or storage. As shown in the drawing the 35 fiber boards. Th plate 3 is provided with an cap structure is at the top of the container but aperture i t hi t tubular portion 4 f a it could be arranged at the bottom, or at both top ring 5 is fitted. This tubular portion is threaded and bottom as none of the fumigating Chemical so as t receive the threaded wall 6 of a cap body comes directly in contact with any of the contents The cap body 1, in addition to wall 6, is formed of the container but only the vapor from the cap 40 with a top 8, which merges into the wall 6 and body In forming the cap structure material of any the wall 6 in turn merges into an mturned flange 9 which flange is provided with notches or sort may be used but it has been found desirable to use the cutout portion from the ring 2 as otha'way portlons as Shown Particularly m erwise this material would be wasted. The ring Preferably the cap body I 15 formed on one in- 2' as clearly brought out in my copending applitegFal plece Pressed mto Shape Just? cation, is formed from metal and is substantially scribed, though it could be made in several pieces U shaped in cross Section at n m The and soldered or secured together in any suitable terial left over after forming this ring is ample manner. As illust in i there is to form the entire cap structure. When the cap 50 vided a Was e H which is a p d tightly in structure is positioned as shown in the draw- Place beneath the ring 5 by a y desired number of ing, the ring 5 and associated parts are inside the rivets l2. These rivets not only clamp the washer keg or container so that the ring and the tubuin place to provide a substantially airtight conlar portion 4 cannot readily become loose but will nection but hold the ring 5 with the threaded at all times present the desired structure for the 55 cap member and a brace or reinforcement for the plate 3. o 7

In Fig. 4 a slightly modified structure is shown wherein the cap body 1 is provided with a small tubular portion 6 fitting into a small tubular portion fitted into said aperture and an cutturned flange overlapping part of said plate, a plurality of securing rivets extending throu'ghsaid flange and said plate for holding said ring in place, a gasket interposed between the ring and said plate for providing an airtight connection, a cap body having a solid end and threaded tubular member screwed into said threaded tubular portion, said a body having an end'formed with a thickened plate provided with an aperture, a ring having a tubular threaded threaded tubular member being formed with an inturned flange, a fumigating carrying element arranged in said cap body, and a foraminous plate removably mounted on said inturned flange presenting a bottom closure for said cap body.

2. A fumigating cap structure for container including a tubular member, means'for connecting the tubular member to part of the container, a cap body having a solid end merging into a threaded tubular extension screwed into said tubular member, said tubular, extension having an inturned flange notched att spaced intervals, means acting as a carrier for a fumigating substance, said means being arranged in said cap body, and a' removable foraminous plate carried bysaid flange, said plate having radially extending projections normally resting on said inturned flange, said projections being slightly less in width than said notches and having the same spacing as said notches, whereby said plate'may be easily 9 applied andrre noved; t WILLIAM C; PURDY. 

